All of the contents inside the box Ms. Silvers and Grandma Quinn open in "Just Add Attention" are from things that were popular with young people in the 1990s. That's when RJ and Noelle were in middle school and were protectors.
Abby Donnelly is a bit of detective herself and is always talking to the writers about her theories to where the 'Just Add Magic' mystery is headed. She's right more often than not.
The last time Kelly, Darbie, and Hannah were spelled by someone else eating something in Mama P's was when Chuck ate the sleepy spell in "Just Add Fire". That spell almost put them into a deep sleep for an entire year.
Grandma Quinn has been trying to escape magic her whole life. She's been against the magic ever since she and her friends accidentally made Chuck Peizer disappear at the 1965 Pluot Festival.
One of Hannah's character traits is that she is always worried about getting sick and making sure she has a clean working environment for cooking. It's not a surprise she believes Noelle spelled them with a sickness spell in "Just Add Attention".